Manuals / Lochinvar / Household Appliance / Boiler

Lochinvar 400, 801 operation manual Loop

Models: 400 801

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Installation & Operation Manual

6 Hydronic piping (continued)

Figure 6-11Single Boiler - Multiple Temperatures with DHW Piped as a Zone

TEMPERATURE		TEMPERATURE
TEMPERATURE		LOOP 3
TEMPERATURE	LOOP 2
LOOP 1

AIR SEPARATOR

PRESSURE

GAUGEBALL VALVE (TYPICAL)

MAKE UP WATER

		EM
	ST
TO	SY
TO

		EM
	ST
OM SY
FR

Y-STRAINER (RECOMMENDED)

BACK FLOW

PREVENTER

PRESSURE REDUCING

VALVE

DRAIN POINT (TYPICAL)

EXPANSION

TANK

PRESSURE RELIEF VALVE

FLOW CHECK VALVE (TYPICAL)

BOILER CIRCULATOR

INDIRECT DHW
TANK
HOT WATER OUT
ANTI-SCALD	UNION (TYPICAL)
MIXING VALVE	DRAIN
COLD WATER IN	DRAIN
DOMESTIC	TEMPERATURE / PRESSURE
HOT WATER	TEMPERATURE / PRESSURE	BOILER
CIRCULATOR	GAUGE

CAUTION

CAUTION

NOTICE

NOTICE

Indirect water heaters are capable of transferring a limited number of Btu’s into the water. Ensure boiler output does not not exceed indirect water heater transfer capabilities.

Mixing valves are required for the protection of low temperature loops.

Please note that these illustrations are meant to show system piping concept only, the installer is responsible for all equipment and detailing required by local codes.

Please note that the installer is responsible for ensuring DHW prioritization when piped as a zone.

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Lochinvar 400, 801 operation manual Loop

Contents

Models 400 Contents Please read before proceeding When servicing boilerStainless steel heat exchanger Knight XL How it worksModel Models 601 Knight XL Boiler =B=R Rating RatingsCloset and alcove installations Installation must comply withDetermine boiler location Before locating the boiler, checkAlcove Installation Provide air openings to room Residential garage installationVent and air piping Flooring and foundationWhen using an existing vent system to install a new boiler Products to avoidAreas likely to have contaminants When removing a boiler from existing common vent system Prepare boiler Remove boiler from wood palletGas conversions Model Leveling the boiler Models 601General venting Direct venting options Vertical Vent Requirements for installation in Canada Install vent and combustion air pipingInstalling vent or air piping General ventingVent Pipe, and Fittings PVC/CPVC air intake/vent connectionsStainless steel vent Air inlet pipe materialsStainless Steel Air Intake/vent Connections FasNSeal Saf-T VentRemoving from existing vent Optional room airAir contamination Model Description Kit NumberSidewall direct venting If using the alternate sidewall terminationVent/air termination sidewall Determine location3AClearance to Gravity Air Inlets Bird Screen Typical Prepare wall penetrationsPrepare wall penetrations Alternate Field Supplied Option Multiple vent/air terminationsTermination and ﬁttings Description and usage Sidewall termination installation9Concentric Vent Dimensional Drawing Models 400 Multiventing sidewall terminations 11Concentric Vent Sidewall AttachmentVent/air termination vertical Vertical direct ventingMultiple vent/air terminations Prepare roof penetrations4Concentric Vertical Termination Vertical termination installationMm see -9, Multiventing vertical terminationsConcentric Venting Arrangement Alternate vertical concentric venting10Existing Vent as a Chase Existing vent as a chaseSystem water piping methods General piping information Hydronic pipingLow water cutoff device Chilled water systemHydronic piping Near boiler piping components Flow switch adjustmentNear boiler piping connections Circulator sizingVariable speed pump option Head Feet Pressure20F 25F 30F 35F Model 7Single Boiler Multiple Temperatures 8Single Boiler Primary/Secondary Piping Manifold Pipe Sizes in Inches mm Number of Units10Multiple Boilers Primary/Secondary Piping Loop Gas connections Connecting gas supply pipingPropane Gas Natural gasInches Check inlet gas supplyGas Pressure Gas valve replacementInstallation must comply with Field wiringLine voltage connections Low voltage connectionsLouver proving switch Outdoor temperature sensorHigh gas pressure switch Low gas pressure switchAlarm contacts Flow switchWiring of the cascade ModbusManual Condensate drain Condensate disposalStart-up Freeze protection when usedCheck/control water chemistry Fill and test water systemCheck thermostat circuits Check for gas leaksInspect/ﬁll condensate system Inspect/check condensate lines and ﬁttingsStart the boiler Final checks before starting the boilerIf boiler does not start correctly Check system and boilerFor Your Safety Read Before Operating Natural Gas Propane Set space heating operationVerify DHW mode Set domestic hot water DHW operationConﬁguration of the cascade General Operating informationProtection features Boiler temperature regulation Cascade Outdoor reset operation, if usedOperation Display Sequence of operationStandby, ready to start a new cycle Navigation Dial Knight XL control moduleAccess modes InstallerUser Call for Heat Information Dial Function Maintenance Maintenance and annual startup Service technicianInstructions Address reported problems MaintenanceClean condensate trap Check all piping for leaks Inspect boiler areaCheck water system Flue vent system and air pipingCheck expansion tank Check boiler relief valveCheck all boiler wiring Check ignition ground wiringCheck control settings Inspect ignition and ﬂame sense electrodesCleaning boiler heat exchanger Check ﬂame signalReview with owner Model Kit Part Component Number DescriptionLOW Voltage 120 VAC High Voltage Diagrams2Ladder Diagram Page KBXII-I-O Rev D